A minimally invasive geological prospecting method

Abstract

The invention provides a 'micro-invasive' geological exploration method. The micro-invasive geological exploration method comprises the steps that step 1, an impact mode of an impact rotary drill rig is started, so that the impact effect is generated by the impact rotary drill rig, the impact rotary drill rig sequentially transmit impact energy to a drill bit through a drilling rod and a drilling tool during the impacting process, so that the drill bit moves downward to impact on a covering layer; and step 2, a soil layer and stratum condition reached by the drill bit is judged, when the drill bit completely penetrates through the covering layer and makes contract with a bedrock layer, an impact and rotary mode of the impact rotary drill rig is started, so that the impact rotary drill rig sequentially transmit the impact energy to the drill bit through the drilling rod and the drilling tool, the drill bit moves downward to impact on the bedrock layer, and the drilling bit is further driven by the impact rotary drill rig to rotate during the process that the drill bit moves downward to impact on the bedrock layer. According to the micro-invasive geological exploration method, defects that massive surface exposure engineering such as blasting, excavator or manual spading and pickaxing used in an existing exploration method seriously damages the natural environment and traditional drilling requires a lot of water are overcome.

Description

technical field [0001] The invention relates to the technical field of geological prospecting, in particular to a "minimally invasive" geological prospecting method. Background technique [0002] In the forest area of ​​Heilongjiang Province in my country, there is a shallow covering layer of 2-4 meters composed of humus soil and residual slope gravel on the surface (different from the thick covering layer greater than 5 meters in the grassland area of ​​Inner Mongolia). When the geochemical soil measurement of mineral exploration is abnormal, explosive blasting, artificial spade digging, excavator mechanical digging, water surface drilling and other methods are used in the past. The groove-shaped trench formed by it has a depth of 2-4 meters and a width of 8- 10 meters, and its length is as little as 3-5 meters, as much as 100-200 meters, or even 300-500 meters, forming a "spectacular" Tongtian trough, destroying a large area of ​​surface vegetation and destroying a large num...

AI Technical Summary

Problems solved by technology

Although shallow surface drilling in the past has less damage to vegetation, it is extremely difficult to obtain water and supply water in forest areas

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